Paris Hilton Loves Vegas

Paris Hilton and boyfriend Benji Madden partied it up in Las Vegas for the second night in a row on Saturday (June 7th). The couple along with Nicky Hilton and boyfriend David Katzenberg were at Tao club to celebrate Allison Melnick's birthday.

Paris was drinking and smoking all night, which confirm she isn't pregnant ... or we hope it confirms she isn't pregnant. With Paris you never know.

(Photo credit : Wenn)